Someone show me a 5' plant under a led that yields more than a 5' plant that was vegged under a MH for the same time as the led and flowered under a hps, once I see that then il leave the 20th century. Why is heat always the argument? We do know about exhaust fans dont we? Im in south florida, its 85 outside today and my central AC is set at 76, my 4x4 tent is running at 81 12" below my 600 MH in a open hood with a 6" exhaust fan running, come flower il close the hood and it will run at 78-79, pretty simple problem to solve.